Nut-lock.



J. ARRENBREGHT.

NUT LOCK.

APPLICATION TILED JULY 25, 1910.

972,796. .Patented Oct. 18, 1910. r

R 5 a i 5 a en'bv'echt JOHN ARRENBBECHT, 0F SALEM, OHIO.

NUT-LOGIC.

Specification of Letters Patent.

PatentedOct. 18, 1910.

Application filed July as, 1910. Serial No. 573,897.

To all whom it may concern:

Be it known that I, JOHN ARRENBREOHT, a citizen of the United States ofAmerica, residing at Salem, in the county of Columbiana and State ofOhio, have invented certain new and useful Improvements in Nut- Locks,of which the following is a specifica tion, reference being had thereinto the accompanying drawing.

This invention relates to nut locks, and the objects of my invention areto provide positive and reliable means for locking a nut upon a boltwhereby it cannot become accidentally displaced, and to provide a nutlock that can be advantageously used in connection with rail joints,bridges, rolling stock and structure subjected to vibrations which havea'tendency to loosen nuts upon bolts.

Further objects of my invention are to provide a simple, durable andinexpensive nut lock that can be used in connection with the ordinarytype of bolt, and further, to provide a nut lock that can be easily andquickly installed and removed without injuring the nut or bolt.

These and such other objects as may hereinafter appear are attained bythe mechanical construction to be hereinafter specifi cally describedand then claimed.

Reference will now be had to the drawing, wherein Figure 1 is a. sideelevation of the nut lock, Fig. 2 is a longitudinal sectional view ofthe same, Fig. 3 is an end view of a split nut forming part of thedevice, Fig. 4 1 s.a horizontal sectional view of a portion of the nutlock, Fig. 5 is an end view of the locking nut, and Fig. 6 is ahorizontal sectional view of a portion of the same.

In the accompanying drawing, the reference numerals 1 and 2 denote, bythe way of an example, two pieces of material adapted to be connected bya bolt 3 having the threaded end 4 thereof protruding from the piece ofmaterial 1.

Screwed upon the threaded end 4 of the bolt is a nut 5 having the outerside thereof provided with a conical-shaped sleeve 6, said sleeve havinga threaded bore 7 registering with the threaded bore 8 of the nut- 5,while the periphery of the sleeve 6 is smooth, and tapered, as at 9. Theouter face of the nut 5 is provided with a plurality of recesses 10,these recesses intercepting the facets of the nut 5, as at 10 and incommunication with each recess is an inclined way 10 Screwed upon thethreaded end of the bolt 8 is a square, hexagon or octagon shaped nut11, said nut having the inner face thereof provided with an annularrecess 12 having an inclined wall 13 to engage the outer periphery ofthe sleeve 6. Secured to the inner face of the nut 11 by screws 14: orother fastening means are two diametrically opposed compound curvedresilient arms 15 adapted to engage in the recesses 10 of the nut 5, thenut 11 having the faces thereof cut away, as at 15 to accommodate aportion of the resilient gripping arms 15.

The nut 5 is split or slotted, as at 16, whereby the nut 11 is screwedupon the bolt 3 and impinges the sleeve 6, the nut 5, which ispreferably made of a malleable metal, is sprung or contracted tofrictionally engage the threads of the bolt 3, and after the nut 11 hasbeen rotated upon the sleeve 6 as far as possible, the resilient arms 15will engage in two of the oppositely disposed recesses 10 gnld therebyhold the nuts 5 and 11 upon the o t 3. nut 5 that firmly anchors thesame upon the bolt after it has been contracted by the nut 11 upon thesleeve 6, the threads of the nut 11 in conjunction with the threads ofthe bolt 3 carrying said nut into proximity with the nut 5, whereby theresilient arms 15 can readily engage in the recesses 10.

The inclined ways 1O permit of the arms 15 easily engaging in therecesses 10* to pre vent a rearward movement of the nut 5, and the lips16 above the inclined ways 10 protect the arms 15, while the open endsof the recesses 10 permit of an instrument being inserted behind thearms 15 and force the same out of the recesses 10, whereby the nut 11can be removed. The lips 17 of the nut 11 protect the secured ends ofthe arms 15.

\Vhile in the drawing there is shown a preferred embodiment of theinvention, it is to be understood that the structural elements thereofare susceptible to such changes as fall within the scope of the appendedclaim.

What I claim is In a nut lock, the combination with two pieces ofmaterial, and a bolt extending through said material and having thethreaded end thereof protruding from one of said pieces of material, ofa split nut screwed upon said bolt to engage one of the pieces ofmaterial, said nut having the outer face It is the gripping action ofthe split thereof provided with a conical-shaped sleeve having athreaded bore registering with the threaded bore of said nut, said nuthaving the outer face thereof provided with a plurality of recesses incommunication with inclined ways formed in the faces of said nut, alocking nut screwed upon said bolt and having the inner face thereofprovided with a recess having tapering walls adapted to engage thesmooth tapering periphery of said sleeve, and oppositely disposedcompound curved resilient arms secured to the inner face of said lockingnut and adapted to engage in two oppositely disposed recesses of saidsplit nut, said nut belng cut away to provide clearance for said arms,substantially as, and for the purpose herein described. In testimonywhereof I afiix my signature 1n the presence of two witnesses.

JOHN ARRENBRECHT. Witnesses: i

JOHN RoBUsoH, PETER HEOK.

